| Exam 200-355 | Question id=2469 | 802.11 Technology Fundamentals |
Which statement describes spread spectrum technology in wireless communications?
| A. |
Signal is spread across optical pulses. | |
| B. |
Signal is spread across variations of amplitudes. | |
| C. |
Signal is spread across one frequency. | |
| D. |
Signal is spread across a whole band of frequencies. |
spread-spectrum techniques are methods by which a signal with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. Spread spectrum generally makes use of a sequential noise-like signal structure to spread the normally narrowband information signal over a relatively wideband (radio) band of frequencies.